Α.Σ.Π.Ρ.Ο.Σ. ( A.S.P.R.O.S. )

Α ΣΤΕΡΟΣΚΟΠΕΙΟ
Σ ΥΣΤΗΜΑΤΙΚΩΝ
Π ΑΡΑΤΗΡΗΣΕΩΝ
Ρ ΟΗΣ
Ο ΥΡΑΝΙΩΝ
Σ ΩΜΑΤΩΝ

Γεωγραφικό Πλάτος : 40°, 53΄, 56¨ Β.


Γεωγραφικό Μήκος : 22°, 38΄, 05¨ Α.


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The German comet group

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Current comets (weekly)
2018 December 10
  • C/2018 L2(ATLAS)            10.0 mag  Oph     observations images low
  • C/2016 N6 (PanSTARRS)       12.5 mag  Hya     observations images
  • 64P/Swift-Gehrels            8.5 mag  Tri     observations images
  • 46P/Wirtanen                 4.5 mag  Cet     observations images
  • 38P/Stephan-Oterma          10.5 mag  CnC     observations images

https://remanzacco.blogspot.com/

Sunday, November 11, 2018

New Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto)

CBET 4569 (issued on 2018, November 08) and  MPEC 2018-V151 (2018, November 11),  announce the discovery of a 10th-magnitude comet by  Donald E. Machholz (Colfax, CA, U.S.A) and independently by Shigehisa Fujikawa (Kan'onji, Kagawa, Japan) and Masayuki Iwamoto(Awa, Tokushima, Japan).
The new comet has been designated C/2018 V1 (Machholz-Fujikawa-Iwamoto).
D. Machholz reported his VISUAL DISCOVERY on Nov. 7.531 UT with a 0.47-m reflector (113x). He also observed the comet with similar appearance on Nov. 8.533
Shigehisa Fujikawa  found the object (with no description provided) on Nov. 7.82 UT on a CCD image obtained with a 120-mm-f.l. f/3.5 lens. His discovery was reported to the Central Bureau's TOCP webpage, which produced the provisional designation TCP J12192806-0211143
Masayuki Iwamoto discovered the new object on images obtained on Nov. 7.841 with a 10-cm f/4.0 Pentax SDUF II telephoto lens and a Canon EOS 6D camera; Iwamoto called it a possible comet of mag 10 with approximate position R.A. = 12h19m30s, Decl. = -2d11' (equinox 2000.0) and his observations was reported on TCP J12192806-0211143 TOCP webpage. He added that he also observed it one minute later and detected no movement.Prompted by the Iwamoto's remark in the TOCP webpage about the possible cometary nature of this transient I decided to perform  follow-up measurements of this object. The telescope I chose was T14 astrograph in New Mexico due to its wide field FOV (155.8 x 233.7 arc-mins). In fact as only 1 astrometric position was available at that time and my observation was scheduled 16 hours after it was taken, in case of a comet it was important to have as much field as possible around that only reported astrometry point.As it happens, it was a comet and I found it about 51 arcmin from the reported astrometry available (60 arcmin is 1 degree). Single unfiltered 60 second exposure, obtained remotely on 2018, November 08.5 from H06 (iTelescope network) through a 0.10-m f/5 reflector + CCD, shows that this object is a comet with a diffuse coma about 2 arcmin in diameter.
My astrometry of this new comet was reported to MPC in order to allow it to be put on "The Possible Comet Confirmation Page" (TPCCP) for fellow observers around the world to observe it.

My confirmation image (click on it for a bigger version).



Below the list of observations in the order they came (following the posting on the TOCP and after that on the Minor Planet Center's NEOCP webpages) as reported on CBET 4569 (click on it for a bigger version):



Below you can see a short animation spanning about 35 minutes (70 x 30sec exposures) obtained on Nov. 9.16 by fellow Italian amateur astronomer Alfonso Noschese from his "Osservatorio Elianto" (MPC code K68 - 0.3-m f/4.0 Newtonian reflector + CCD; AstroCampania association). (click on it for a bigger version):



On November 11.16, A. Noschese imaged again comet C/2018 V1 that in the meantime developed a nice ion tail clearly visible in his images below:




M.P.E.C. 2018-V151 assigns the following preliminary parabolic orbital elements to comet C/2018 V1: T 2018 Dec. 3.51; e= 1.0; Peri. =  88.83; q = 0.38;  Incl.= 143.96

Below you can see a graph generated using the software Orbitas and showing the predicted magnitude (in red) versus the maximum height (for Northern Hemisphere). (click on the image for a bigger version). Visual estimates have the comet at mag. ~8.0 on November 12, 2018 (as always with comets, the future magnitudes reported here are only indicative).




Congrats to Don Machholz, Shigehisa Fujikawa and Masayuki Iwamoto!

This is 12th comet discovery for Machholz, coming 746 search hours after his discovery of C/2010 F4 (cf. IAUC 9132); the 2nd comet discovery for Iwamoto (see here for more info about his previous discovery C/2013 E2) ; the 7th comet discovery for Fujikawa



by Ernesto Guido
The Astrophysical Journal
- Dynamics of Large-scale Coronal Structures 
as Imaged during the 2012 and 2013 Total Solar Eclipses.
Nathalia Alzate1, Shadia R. Habbal2, 
Miloslav Druckmüller3, 
Constantinos Emmanouilidis4, 
and Huw Morgan5
Published 2017 October 17 • © 2017. The American Astronomical Society. All rights reserved. 
-The Astrophysical Journal, Volume 848, Number 2.

"....... Eclipse Observations and Ancillary Space-based Data.
The total solar eclipse white light images of 2012 and 2013, acquired by C. Emmanouilidis and processed by M. Druckmüller, are shown in Figures 1 and 2, respectively. Totality started at 20:37:39 UT on 2012 November 13 in Australia, when the Sun was at 13° above the horizon. A modified Canon 5D Mark I with an extended sensitivity in the red (in particular, for Hα) was used, with a Takahashi TSA102 refracting telescope with a 102 mm f/8 aperture and a Takahashi TOA-35 coma corrector. The image shown in Figure 1 is a composite of a sequence of exposure times ranging from 1/1000 to 8 s. On 2013 November 3, totality started at 13:52:40 UT in Gabon when the Sun was 45° above the horizon. A Takahashi FSQ-106 astrograph refracting telescope with a 106 mm f/5 aperture was used with a Nikon D7100, with exposure times ranging from 1/2000 to 8 s, which yielded the corresponding 2013 image (see Figure 2). A second wider-field telescope was also used. It consisted of a Takahashi FS-60C refracting telescope with a 60 mm f/6 aperture and its dedicated coma corrector. The telescope was attached to a modified Canon 350D DSLR camera to provide an extended sensitivity in the red and Hα. It provided the inset in Figure 2. ......"
Little Eyes on Large Solar Motions!
Me and a team of world leading experts in Solar physics, announced the discovery of two atypical large scale structures in the Sun's corona in a scientific paper that was published this month in The Astrophysical Journal. Later on it was selected as Research Highlight on AAS Nova web page!
With these data we proved that the Corona activity is much more intense than previously thought because high resolution images during the Solar maximum provided the missing pieces from the puzzle between two space observatories (SDO and SOHO) that can't image coronal features near the Sun's limb.
Contributing to real science isn't easy and definitely not always a fun process. Participating in a team with world experts on Solar Corona image processing and Solar Physics scientists is both an honour and a unique learning process. Kudos to all for this remarkable achievement!

Observations from small telescopes have provided this beautiful view of the solar corona during a solar eclipse in 2013. These data have helped researchers better understand what shapes the large-scale structure in the corona. [Alzate et al. 2017]
http://aasnova.org/2017/10/25/little-eyes-on-large-solar-motions/
By  on
Images taken during the solar eclipse in 2012. The central color composite of the eclipsed solar surface was captured by SDO, the white-light view of the solar corona around it was taken by the authors, and the background, wide-field black-and-white view is from LASCO. The white arrows mark the “atypical” structure. [Alzate et al. 2017]
Same as the previous figure, but for the eclipse in 2013. [Alzate et al. 2017]


It seems like science is increasingly being done with advanced detectors on enormous ground- and space-based telescopes. One might wonder: is there anything left to learn from observations made with digital cameras mounted on ~10-cm telescopes?
The answer is yes — plenty! Illustrating this point, a new study using such equipment recently reports on the structure and dynamics of the Sun’s corona during two solar eclipses.

http://www.skyandtelescope.com/astronomy-news/little-eyes-on-large-solar-motions/



Solar Eclipse: View from Tidore, Indonesia
Constantine: "It was an unbelievable spectacle with a huge prominence!"
Date: March 9, 2016
Constantine Emmanouilidi: Diamond Ring Vs. Prominence.
I'm still amazed by the gorgeous combination of the Baileys Beads with this extraordinary prominence just next to it. We were very lucky on this one! The image was made with the smaller telescope with 60mm aperture.
Constantine Emmanouilidi: The corona structures were magnificent during the totality. I really enjoyed the three minutes of totality. To me it was three minutes of pure calmness! And the spectrometer showed that the sun is still very active, more to follow soon.


Nikos Plexidas: Κωνσταντίνε, ευχαριστούμε για τις υπέροχες εικόνες που μας μεταφέρεις....
Εμείς εδώ μακριά έστω και κατ ελάχιστο παρακολουθήσαμε την έκλειψη από το διαδίκτυο και πήραμε μια μικρή γεύση από αυτό το μοναδικής ομορφιάς γεγονός!!!!

Thanks to Constantine Emmanouilidi, amazing capture.




Finally the wait is over and the processing of the data from the Total Solar Eclipse from last March's eclipse is finished. Professor Dr. Miloslav Druckmuller, a world expert in processing images like these have created some mathematical methods to cope with the huge dynamic range in brightness of the Solar Corona. I collaborate with him since many years now and these results are always beyond our imagination!
For me since I'm an amateur astronomer and do it in a volunteer basis, beeing able to capture data that create images like these is like a dream coming true every time! It takes so much effort and multihour travelling to make an Eclipse expedition, but its so rewarding to get a glimpse of the internal solar corona with high detail! Look how many stars can be seen near the solar limb!
You can see high resolution versions in my facebook page called Infection Photography,www.facebook.com/infectionphoto
and my personal web page: http://www.stellar-explosions.com/



http://www.wikisky.org/?ra=23.278700&de=33.996555&zoom=10&show_box=1&box_width=50


Central Bureau for Astronomical Telegrams -- Image credits

IAU Central Bureau for Astronomical Telegrams


image
image

PSN J23164332+3359476, CBAT TOCP discovered 2015/07/28.001 by Constantine Emmanouilidi 

Found in UGC 12474 at R.A. = 23h16m43s.32, Decl. = +33°59'47".6 (= PGC 70909) 

Located 1" west and 3" north of the center of UGC 12474 (Discovery image
Mag 17.0:7/28, Type unknown




Άβαταρ
Θέμα δημοσίευσης: Πρώτη ανακάλυψη υπερκαινοφανούς από Ελληνική Ομάδα!Από τον Κωνσταντίνο Εμμανουηλίδη
μας ανακοινώθηκε η ανακάλυψη υπερκαινοφανούς από την Ελληνική Ομάδα Εύρεσης Υπερκαινοφανών (GSST) στον γαλαξία PGC70909.
Στις 28 Ιουλίου ένας εκ των παρατηρητών της ομάδας αναγνώρισε ένα αντικείμενο κοντά στον γαλαξία με φωτεινότητα 16.8mag.
Στην εικόνα αναφοράς που είχε η ομάδα στο αρχείο της από τις 18 Ιουλίου του 2007 δεν υπάρχει τίποτα στην θέση του ανιχνευμένου αντικείμενου και σε περαιτέρω ανάλυση το αντικείμενο δεν μετατοπίζοταν στις εικόνες.
Στις 29 Ιουλίου στις 3 το πρωί ο στόχος παρατηρήθηκε ξανά και εμφανίστηκε το αντικείμενο στο ίδιο σημείο με φωτεινότητα 16.2mag γεγονός που σημαίνει ότι η ανίχνευση έγινε στο αρχικό στάδιο που η παρατήρηση γίνεται και περισσότερο ωφέλιμη.
Η ανακοίνωση του στόχου έγινε στο Κέντρο Αστρονομικών Τηλεγραφημάτων (CBAT) και Ιαπωνας παρατηρητής επιβεβαίωσε λίγες ώρες αργότερα με απομακρυσμένη παρατήρηση από αστεροσκοπείο στην Ισπανία την ύπαρξη του υπερκαινοφανούς.
Μάλιστα η φωτομετρία της δεύτερης παρατήρησης από Θεσσαλονίκη ταιριάζει με αυτού του Ιάπωνα παρατηρητή στο 16.2mag.
Η Ομάδα ιδρύθηκε το 2003 και από τότε ψάχνει στον ουρανό για υπερκαινοφανείς.
Έχουν ανιχνέυσει αρκετές εκρήξεις μέχρι σήμερα αλλά ποτέ πρώτοι.
Αυτήν η παρατήρηση είναι και επίσημα η πρώτη ανακάλυψη υπερκαινοφανούς από την Ελλάδα και από Έλληνες παρατηρητές. 

Στον παρακάτω σύνδεσμο μπορείτε να δείτε τις εικόνες της ανακάλυψης: 
http://www.stellar-explosions.com/supernova-at-galaxy-pgc-70909/

Από το astrovox συγχαίρουμε τον Κωνσταντίνο και την ομάδα για αυτή τη σπουδαία επιτυχία και την ευόδωση πολυετών προσπαθειών!
 
Submitted by Constantinos Theodoridis (4676) 
on 2015-06-19T04:25:27Z
publicly visible: yes no

Job Status Job 1141374: Success


Calibration

Center (RA, Dec):(4.570, 36.630)
Center (RA, hms):00h 18m 16.774s
Center (Dec, dms):+36° 37' 48.781"
Size:6.51 x 4.34 deg
Radius:3.910 deg
Pixel scale:6.03 arcsec/pixel
Orientation:Up is 180 degrees E of N
WCS file:wcs.fits
New FITS image:new-image.fits
Reference stars nearby (RA,Dec table):rdls.fits
Stars detected in your images (x,y table):axy.fits
Correspondences between image and reference stars (table):corr.fits
KMZ (Google Sky):image.kmz
Astrometry.net logoSigned in as Constantinos Theodoridis